28780920

素因数分解:

$2^3\times 3^7\times 5^1\times 7^1\times {\mathrm{47}}^1$

素因数の和:86

約数の個数: 256

約数和(自身を含む): 113356800

約数和(自身を除く): 84575880

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 27, 28, 30, 35, 36, 40, 42, 45, 47, 54, 56, 60, 63, 70, 72, 81, 84, 90, 94, 105, 108, 120, 126, 135, 140, 141, 162, 168, 180, 188, 189, 210, 216, 235, 243, 252, 270, 280, 282, 315, 324, 329, 360, 376, 378, 405, 420, 423, 470, 486, 504, 540, 564, 567, 630, 648, 658, 705, 729, 756, 810, 840, 846, 940, 945, 972, 987, 1080, 1128, 1134, 1215, 1260, 1269, 1316, 1410, 1458, 1512, 1620, 1645, 1692, 1701, 1880, 1890, 1944, 1974, 2115, 2187, 2268, 2430, 2520, 2538, 2632, 2820, 2835, 2916, 2961, 3240, 3290, 3384, 3402, 3645, 3780, 3807, 3948, 4230, 4374, 4536, 4860, 4935, 5076, 5103, 5640, 5670, 5832, 5922, 6345, 6580, 6804, 7290, 7560, 7614, 7896, 8460, 8505, 8748, 8883, 9720, 9870, 10152, 10206, 10935, 11340, 11421, 11844, 12690, 13160, 13608, 14580, 14805, 15228, 15309, 16920, 17010, 17496, 17766, 19035, 19740, 20412, 21870, 22680, 22842, 23688, 25380, 25515, 26649, 29160, 29610, 30456, 30618, 34020, 34263, 35532, 38070, 39480, 40824, 43740, 44415, 45684, 50760, 51030, 53298, 57105, 59220, 61236, 68040, 68526, 71064, 76140, 76545, 79947, 87480, 88830, 91368, 102060, 102789, 106596, 114210, 118440, 122472, 133245, 137052, 152280, 153090, 159894, 171315, 177660, 204120, 205578, 213192, 228420, 239841, 266490, 274104, 306180, 319788, 342630, 355320, 399735, 411156, 456840, 479682, 513945, 532980, 612360, 639576, 685260, 719523, 799470, 822312, 959364, 1027890, 1065960, 1199205, 1370520, 1439046, 1598940, 1918728, 2055780, 2398410, 2878092, 3197880, 3597615, 4111560, 4796820, 5756184, 7195230, 9593640, 14390460, 28780920]

約数ペア:

[(1, 28780920), (2, 14390460), (3, 9593640), (4, 7195230), (5, 5756184), (6, 4796820), (7, 4111560), (8, 3597615), (9, 3197880), (10, 2878092), (12, 2398410), (14, 2055780), (15, 1918728), (18, 1598940), (20, 1439046), (21, 1370520), (24, 1199205), (27, 1065960), (28, 1027890), (30, 959364), (35, 822312), (36, 799470), (40, 719523), (42, 685260), (45, 639576), (47, 612360), (54, 532980), (56, 513945), (60, 479682), (63, 456840), (70, 411156), (72, 399735), (81, 355320), (84, 342630), (90, 319788), (94, 306180), (105, 274104), (108, 266490), (120, 239841), (126, 228420), (135, 213192), (140, 205578), (141, 204120), (162, 177660), (168, 171315), (180, 159894), (188, 153090), (189, 152280), (210, 137052), (216, 133245), (235, 122472), (243, 118440), (252, 114210), (270, 106596), (280, 102789), (282, 102060), (315, 91368), (324, 88830), (329, 87480), (360, 79947), (376, 76545), (378, 76140), (405, 71064), (420, 68526), (423, 68040), (470, 61236), (486, 59220), (504, 57105), (540, 53298), (564, 51030), (567, 50760), (630, 45684), (648, 44415), (658, 43740), (705, 40824), (729, 39480), (756, 38070), (810, 35532), (840, 34263), (846, 34020), (940, 30618), (945, 30456), (972, 29610), (987, 29160), (1080, 26649), (1128, 25515), (1134, 25380), (1215, 23688), (1260, 22842), (1269, 22680), (1316, 21870), (1410, 20412), (1458, 19740), (1512, 19035), (1620, 17766), (1645, 17496), (1692, 17010), (1701, 16920), (1880, 15309), (1890, 15228), (1944, 14805), (1974, 14580), (2115, 13608), (2187, 13160), (2268, 12690), (2430, 11844), (2520, 11421), (2538, 11340), (2632, 10935), (2820, 10206), (2835, 10152), (2916, 9870), (2961, 9720), (3240, 8883), (3290, 8748), (3384, 8505), (3402, 8460), (3645, 7896), (3780, 7614), (3807, 7560), (3948, 7290), (4230, 6804), (4374, 6580), (4536, 6345), (4860, 5922), (4935, 5832), (5076, 5670), (5103, 5640)]